#ifndef __COMM_HPP__
#define __COMM_HPP__ 

#include<iostream>
#include<string>
#include<cstdlib>
#include<cstring>
#include<sys/ipc.h>
#include<sys/shm.h>
#include<sys/types.h>
#include<sys/stat.h>
#include"log.hpp"
using namespace std; 
#define FIFO_FILE "./myfifo"
#define MODE 0664

Log log; 

const int size = 4096;
const string pathname = "/home/qian";
const int proj_id = 0x6666;

key_t GetKey()
{
    key_t k = ftok(pathname.c_str(), proj_id);
    if(k < 0)
    {
        log(Fatal, "ftok error: %s", strerror(errno));
        exit(1); 
    }
    log(Info, "ftok success, key is : 0x%x", k); 
    return k; 
}

int GetShareMemHelper(int flag)
{
    key_t k = GetKey();
    int shmid = shmget(k, size, flag);
    if(shmid < 0)
    {
        log(Fatal, "create share memory error: %s", strerror(errno));
        exit(2); 
    }
    log(Info, "create share memory success, shmid: %d", shmid); 
    return shmid; 
}

int CreateShm()
{
    return GetShareMemHelper(IPC_CREAT | IPC_EXCL | 0666); 
}

int GetShm()
{
    return GetShareMemHelper(IPC_CREAT); 
}

enum 
{
    FIFO_CREAT_ERR = 1,
    FIFO_DELETE_ERR,
    FIFO_OPEN_ERR
};

class Init
{
public:
    Init()
    {
        int n = mkfifo(FIFO_FILE, MODE);
        if(n == -1)
        {
            perror("mkfifo");
            exit(FIFO_CREAT_ERR);
        }
    }

    ~Init()
    {
        int m = unlink(FIFO_FILE);
        if(m == -1)
        {
            perror("nulink");
            exit(FIFO_DELETE_ERR); 
        }
    }
};

#endif 
